Thereof, is Wedgwood always marked?
Wedgwood is almost always stamped. I've read that some of the very old pieces might not have a mark, but almost everything else does. The most common stamps read, “Wedgwood England” or “Wedgwood Made in England.” Another common one is “Wedgwood of Etruria & Barlaston.” Their icon is typically an urn.
Similarly, you may ask, how can you tell if Wedgwood is real?
Look at the base for the impressed name “Wedgwood.” If it is stamped in individual lowercase letters, that points to a date before 1769, but usually it will be in capitals. If you see the word “England,” that dates the piece to after 1891. Pieces marked “Made in England” belong to the 20th century.
Jasperware, type of fine-grained, unglazed stoneware introduced by the English potter Josiah Wedgwood in 1775 as the result of a long series of experiments aimed at discovering the techniques of porcelain manufacture. Its name derives from the fact that it resembles the natural stone jasper in its hardness.